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Expired European patentEurope

Method and apparatus for transmitting data to the surface from an oil well

EP 0314654 B1 · Applicant: SAGA PETROLEUM A.S.

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed October 21, 1988 and granted January 8, 1992. A European patent lasts at most 20 years from filing, so its term ended October 21, 2008.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by April 21, 2014.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledOctober 21, 1988
PublishedMay 3, 1989
GrantedJanuary 8, 1992
Term endedOctober 21, 2008
Application numberEP 88850358
Classification (CPC)E21B47/13

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedOct 21, 1988PublishedMay 3, 1989Patent grantedJan 8, 1992Term endedOct 21, 2008

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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